//
//  LLTabbar.swift
//  新浪微博
//
//  Created by mac on 16/5/20.
//  Copyright © 2016年 mac.com. All rights reserved.
//

import UIKit

class LLTabbar: UITabBar {
    //在子视图中添加按钮
    override init(frame: CGRect) {
        super.init(frame: frame)
        addSubview(plusBtn)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    //添加加号按钮  使用懒加载获取按钮
    lazy var plusBtn: UIButton = {
        let btn = UIButton()
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: .Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: .Highlighted)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: .Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: .Highlighted)
    return btn
    }()
    override func layoutSubviews() {
        super.layoutSubviews()
        let w = self.bounds.width/5
        let h = self.bounds.height
let rect = CGRectMake(0, 0, w, h)
        var index: CGFloat = 0
        for subview in subviews{
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!){
                
                subview.frame = CGRectOffset(rect, w * index, 0)
                index += (index == 1 ? 2 : 1)
                
            }
        }
        plusBtn.frame = CGRectOffset(rect, 2*w, 0)
    }
    
    
    
}
